The Labour Party had suffered security incident following a cyber-attack on cloud computing provider Blackbaud.
Hackers had accessed information about thousands of party donors over a period of several years.
Personal and confidential information about donors, including analysis that was run by the party about their personal views, had been accessed.
All donors, including those who donated less than £7,500 and therefore did not have to declare their donation to the Electoral Commission, had their data breached.
"id": "THE2216123",
"linkid": "the-labour-party",
"type": "Data Leak",
"date": "07/2020",
"severity": "85",
"impact": "3",
"explanation": "Attack with significant impact with internal employee data leaks"